//
// ModelsPage.cs
//
// Author: najmeddine nouri
//
// Copyright (c) 2013 najmeddine nouri, amine gassem
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
// Except as contained in this notice, the name(s) of the above copyright holders
// shall not be used in advertising or otherwise to promote the sale, use or other
// dealings in this Software without prior written authorization.
//
using System;
using System.Collections.Generic;
using System.Linq;
using  Badr.Orm.Fields;

namespace Badr.Orm
{
	public class ModelsPage
	{
        public static ModelsPage Empty = new ModelsPage(null, 0, NO_PAGE_NUM, 0);

        public const int NO_PAGE_NUM = -1;

		public ModelsPage(IList<Model> models, int pagesCount, int pageNum, int pageSize)
		{
			Models = models;
			PageSize = pageSize;
            PagesCount = pagesCount;
            PageNum = pageNum;
		}

		public int PageNum { get; private set; }
		public int PageSize { get; private set; }
		public int PagesCount { get; private set; }
        public IList<Model> Models { get; private set; }
        public bool IsEmpty { get { return Models == null || PageNum < 1 || PageNum > PagesCount; } }
        public bool IsFirstPage { get { return PagesCount == 0 || PageNum <= 1; } }
        public bool IsLastPage { get { return PagesCount == 0 || PageNum >= PagesCount; } }
	}
}